Physics
For a ray incident normally on a plane mirror, the angle of incidence is :
- 90°
- 45°
- 30°
- 0°
Reflection of Light
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Answer
0°
Reason — For a ray incident normally on a plane mirror, the angle of incidence is i = 0°, therefore the angle of reflection r = 0°. Thus, a ray of light incident normally on a mirror is reflected along the same path.
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